Igmp Snooping Implementation - Huawei Quidway S3900 Series Operation Manual

Operation Manual – Multicast Protocol
Quidway S3900 Series Ethernet Switches-Release 1510
Muliticast router Muliticast Muliticast Muliticast router Muliticast Muliticast router Muliticast Muliticast router
Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch
Video stream Video stream Video stream Video stream
Multicast Multicast Multicast Multicast Multicast Multicast Multicast Multicast
group member group member group member group member group member group member group member group member
Figure 2-1 Multicast packet transmission with or without IGMP Snooping being
enabled

2.1.2 IGMP Snooping Implementation

I. IGMP Snooping terminologies
Before going on, we first describe the following terms involved in IGMP Snooping:
Router port: the switch port directly connected to the multicast router.
Multicast member port: a switch port connected to a multicast group member (a
host in a multicast group).
MAC multicast group: a multicast group identified by a MAC multicast address and
maintained by the switch.
The following three timers are closely associated with IGMP snooping.
Table 2-2 IGMP Snooping timers
Timer
Router
aging timer
Multicast
member port
aging timer
Query
response
timer
Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission
without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping
Video stream Video stream Video stream Video stream
Video stream Video stream Video stream Video stream
Internet Internet Internet Internet Internet Internet Internet Internet
Video stream Video stream Video stream Video stream Video stream Video stream Video stream Video stream
Video stream Video stream Video stream Video stream
Video stream Video stream Video stream Video stream
Non- Non- Non- Non- Non-multicast Non- Non- Non-multicast Non- Non- Non-multicast Non- Non- Non- Non- Non-multicast
group member group member group member group member group member group member group member group member group member group member group member group member group member group member group member group member
Setting
port Aging time of
the router port
Aging time of
the multicast
member ports
Query
response
timeout time
Huawei Technologies Proprietary
Chapter 2 IGMP Snooping Configuration
Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission
with IGMP Snooping with IGMP Snooping with IGMP Snooping with IGMP Snooping
Muliticast Muliticast Muliticast router Muliticast Muliticast router Muliticast router Muliticast Muliticast router
VOD server VOD server VOD server VOD server
Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch
Video stream Video stream Video stream Video stream
Multicast Multicast Multicast Multicast Multicast Multicast Multicast Multicast
Non-multicast Non- Non-multicast Non- Non- Non- Non- Non-
group member group member group member group member group member group member group member group member
group member group member group member group member group member group member group member group member
Packet normally
received before
timeout
IGMP general query
message/PIM
message/Dvmrp
Probe message
IGMP message
IGMP report message
2-2
Video stream Video stream Video stream Video stream Video stream Video stream Video stream Video stream
Internet Internet Internet Internet Internet Internet Internet Internet
Video stream Video stream Video stream Video stream Video stream Video stream Video stream Video stream
VOD server VOD server VOD server VOD server
Non- Non- Non-multicast Non- Non- Non- Non-multicast Non-
group member group member group member group member group member group member group member group member
Timeout action on the
switch
Consider that this port
is not a router port any
more.
Send an IGMP
group-specific query
message to
multicast member port.
Remove the port from
the member port list of
the multicast group.
the